Groundwater Sensor

The Groundwater Sensor detects free hydrocarbons in the C5 to C16 range on the water table in up to 20 feet deep monitoring wells.

Stay in compliance by detecting free hydrocarbon products on the water table in up to 20” deep monitoring wells. A Water Out alarm lets you know that the water level has fallen below the sensor and fuel can no longer be detected. The Groundwater Sensor’s watertight, lockable cap also prevents accidental fuel spills on the ground surface from entering and contaminating the monitoring

Key Features of the Groundwater Sensor

  • Fulfills local, state and federal electronic groundwater monitoring requirement

  • Ideal monitoring method for areas with high water table

  • Not sensitive to background vapors

  • Long-life, reusable sensing element

Product Form

Part Number




Groundwater Sensor for 7' to 10' wells

Locking cap included


Groundwater Sensor for 10' to 15' wells

Locking cap included


Groundwater Sensor for 15' to 20' wells

Locking cap included


Key Benefits

  • Detects all liquid hydrocarbons in C5 to C16 range

  • Detects as little as 1/10" free product on water table

  • Water Out alarm informs you when water table is low and you are no longer in compliance

  • Responds to gasoline in 15 minutes or less; longer in other hydrocarbons in the C5 to C16 range

  • Simply remove Groundwater Sensor from well and expose to air after sensor alarms


Fuel Compatibility

Gas, Diesel, Kerosene, Jet Fuel, Aviation Gas, E15, Bio-Diesel 20, Green Diesel, Waste Oil, Motor Oil

Alarm Notification

Normal: Sensor in water – no hydrocarbons detected

Water Out: Sensor not in water – well dry

Fuel Alarm: Permeable material saturated with fuel

Sensor Out: Sensor not communicating to ATG Console

Operating Principle

Electrical conductivity

Product Activation Height

0.02” (0.5mm)

Operating Temp

+32 to +104°F (0 to +40°C)


Water Float – 4.9” (12.4cm) Long, 1.1” (2.8cm) in Diameter

Standard Cable

64” (162.6cm)